Recommendations for measurement of the veiling glare index of lenses and optical systems

Available format(s)

Hardcopy , PDF

Language(s)

English

Published date

27-11-1973

Publisher

British Standards Institution

Cooperating organizations
Foreword
Recommendations
1. Scope
2. Definitions
3. Preferred conditions
4. Test conditions for the measurement of veiling
glare index
5. General requirements
6. Detailed equipment requirements
7. Specification of measurement conditions
8. Points requiring special attention during veiling
glare measurements
9. Presentation of results
10. Practical experimental techniques
Appendices
A. Preferred format for veiling glare test
B. Other methods of measuring veiling glare index
Figures
1. Equipment for test conditions A and B
2. Equipment for test condition C1
3. Equipment for test condition C2

Laboratory techniques for measuring VGI are described in general terms and recommendations are made regarding the performance of the main subunits of the equipment. Standard methods of specifying conditions of test and of expressing the results. Gives guidelines for the operation of VGI measuring equipment to facilitate the obtaining of accurate results.

Committee	CPW/172
DevelopmentNote	Supersedes 72/31109 DC. (07/2005) Reviewed and confirmed by BSI, December 2011. (11/2011)
DocumentType	Standard
Pages	14
PublisherName	British Standards Institution
Status	Current

This British Standard adopts veiling glare index (bright field) (VGI) as a measure of the veiling glare characteristics of an optical system. Laboratory techniques for measuring VGI are described in general terms and recommendations are made regarding the performance of the main sub-units of the equipment.

Standard methods of specifying conditions of test and of expressing the results are given, while to assist in the intercomparison of VGI figures, four standard test conditions are specified. It is also the purpose of this standard to give guide lines for the operation of VGI measuring equipment such that accurate results may be achieved.

Standards	Relationship
UNE-CEN ISO/TS 15883-5:2008 EX	Identical

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BS 4995:1973

Recommendations for measurement of the veiling glare index of lenses and optical systems

Table of Contents

Abstract

General Product Information

Scope

International Equivalents

Category

Subcategory